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參數(shù)資料
| 型號： | LTC3642IMS8E-3.3E#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.13 A SWITCHING REGULATOR, PDSO8 |
| 封裝： | LEAD FREE, PLASTIC, MSOP-8 |
| 文件頁數(shù)： | 8/20頁 |
| 文件大?。?/td> | 306K |
| 代理商： | LTC3642IMS8E-3.3E#PBF |
LTC3642
16
3642fa
APPLICATIONS INFORMATION
PC Board Layout Checklist
When laying out the printed circuit board, the following
checklist should be used to ensure proper operation of
the LTC3642. Check the following in your layout:
1. Large switched currents ow in the power switches and
input capacitor. The loop formed by these components
should be as small as possible. A ground plane is
recommended to minimize ground impedance.
2. Connect the (+) terminal of the input capacitor, CIN, as
close as possible to the VIN pin. This capacitor provides
the AC current into the internal power MOSFETs.
3. Keep the switching node, SW, away from all sensitive
small signal nodes. The rapid transitions on the switching
node can couple to high impedance nodes, in particular
VFB, and create increased output ripple.
4. Flood all unused area on all layers with copper. Flooding
with copper will reduce the temperature rise of power
components. You can connect the copper areas to any
DC net (VIN, VOUT, GND or any other DC rail in your
system).
TYPICAL APPLICATIONS
Figure 10. High Efciency 5V Regulator
Efciency vs Load Current
VIN
LTC3642
RUN
CIN
4.7μF
HYST
3642 F10a
SW
VIN
5V TO 45V
VOUT
5V
VFB
SS
ISET
GND
L1
220μH
R1
4.2M
R2
800k
CIN: TDK C5750X7R2A475MT
COUT: AVX 1812D107MAT
L1: TDK SLF7045T-221MR33-PF
COUT
100μF
CSS
47nF
RSET
3.3V, 50mA Regulator with Peak Current Soft-Start, Small Size
Soft-Start Waveforms
VIN
LTC3642
RUN
CIN
1μF
SS
3642 TA02a
SW
VIN
4.5V TO 24V
VOUT
3.3V
50mA
VFB
HYST
ISET
GND
L1
47μH
R1
294k
R2
93.1k
CIN: TDK C3216X7R1E105KT
COUT: AVX 08056D106KAT2A
L1: TAIYO YUDEN CBC2518T470K
COUT
10μF
CSS
0.1μF
OUTPUT VOLTAGE
1V/DIV
INDUCTOR CURRENT
20mA/DIV
2ms/DIV
3642 TA03b
LOAD CURRENT (mA)
1
88
EFFICIENCY
(%)
89
90
91
92
94
10
100
3642 F10b
93
VIN = 10V
RSET = 750k
ISET OPEN
RSET = 500k
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| LTC3642IMS8E-5#PBF | 功能描述:IC REG BUCK SYNC 5V 50MA 8MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標準包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應商設備封裝:10-MSOP 裸露焊盤 |
| LTC3642IMS8E-5#TRPBF | 功能描述:IC REG BUCK SYNC 5V 50MA 8MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標準包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應商設備封裝:10-MSOP 裸露焊盤 |
| LTC3642IMS8EPBF | 制造商:Linear Technology 功能描述:DC-DC Converter Step-Down 4.5-45V MSOP8 |
| LTC3646EDE#PBF | 制造商:Linear Technology 功能描述: 制造商:Linear Technology 功能描述:IC REG BUCK SYNC ADJ 1A 14DFN 制造商:Linear Technology 功能描述:BUCK 4-40V 3MHZ 1A 2-30V 14DFN 制造商:Linear Technology 功能描述:BUCK, 4-40V, 3MHZ, 1A, 2-30V, 14DFN 制造商:Linear Technology 功能描述:DP-SWREG/Monolithic, 40V, 1A, 100uA IQ Synchronous Step-Down Converter 制造商:Linear Technology 功能描述:DC-DC CONVERTER, BUCK, ADJ, 3MHZ, DFN-14, Primary Input Voltage:40V, No. of Outputs:1, Output Current:1A, No. of Pins:14, Operating Temperature Min:-40C, Operating Temperature Max:85C, MSL:MSL 1 - Unlimited, Package / Case:14-DFN , RoHS Compliant: Yes |
| LTC3646EDE#TRPBF | 制造商:Linear Technology 功能描述:IC REG BUCK SYNC ADJ 1A 14DFN 制造商:Linear Technology 功能描述:DP-SWREG/Monolithic, 40V, 1A, 100uA IQ Synchronous Step-Down Converter 制造商:Linear Technology 功能描述:DC-DC CONVERTER, BUCK, ADJ, 3MHZ, DFN-14, Primary Input Voltage:40V, No. of Outputs:1, Output Current:1A, No. of Pins:14, Operating Temperature Min:-40C, Operating Temperature Max:85C, MSL:MSL 1 - Unlimited, Package / Case:14-DFN , RoHS Compliant: Yes |
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